Wrench



" June 26, 1923.

J. B. MENZL WRENCH "Filed Feb. 15 1922 Fig. 6

Patented June 26, 1923.

Jenn B. MENZL; ornaY'roN, OHIO.

wnnnorr.

Application filed February 15, 1922. Serial No. 536,615.

one object ofthe invention is to provide a wrench in which the jaws will yield to permit the wrench to be moved in a reverse direction over the corners ofthe nut.

A further object of the invention is to provide such a wrench whichwill be adjustable to accommodate it to nuts of different sizes. j

A further" object of the invention is to provide an open end wrench of this kind which will be of a strong, durable character.

Other objects will appear as the device is described in detail.

In the accompanying drawings 1 is a side elevation of a wrench embodying my inventiomshowing the jaws in their gripping positions; Fig. 2 is a similar view showing the jaws separated to pass the corners of the nut; Fig. 3 is a section taken on the line 3-3 of Fig. 1; Fig. 4 is a section taken on the line 4l lof Fig. 1; Fig. 5 is a section taken on the line 5-5 of: Fig. l; is an end elevation of the wrench; and Fig. 7 is a side elevation of a slightly modified for-1n ofthe wrench.

In these drawings 1 have illustrated one embodiment of my invention and have shown the same as comprising a handle 1 having pivotally mounted thereon a jaw 2. The pivotal connection between the jaw and the handle may be established in various ways but. as here shown. that end of the handle adjacent to the jaw is slotted. as shown at and the corner thereof is rounded to form a bearing surface. The adjacent portion of the jaw structure is recessed. asshown at 4; and the recess has afrounded corner to form a bearingsurfm're to cooperate with the rounded bearing surface on the handle. Extending inwardly from the walls of the recess and spaced from both edges thereof is a lug or web. 5 which enters the slot 3 in the handle and is secured therein by a pivot pin 6. The walls of the recess 4 of the aw structiu'e diverge at a greater angle than do the edges of the end portion of the 'jaw so that the ax-is of the pivoted jaw. To this end the slidable jaw is providedwith an arm, or

handle, thus permitting of the relative movement of the jaw and the handle about the pivot pin 6. A spring pressed plunger 7 engages one wall of the recess and tends to hold the jaw normally in its operdl'lVG. or grippingpposition and when in this positionthe other wall of the recess, as shown at 8. will engage the adjacent part ofthe. handle, andfform a rigid stop to limit the pivotal movement of the This plunger, however, will permitthe aw to yield when pressure is applied thereto and will restore itto its normal position as soon as that pressure is relieved.

A second jawl) ismounted for movement toward and from the first mentioned jaw and this movement is controlled by a device which in turn is controlled by the pivotal movement of the first mentioned jaw. As here shown, the jaw 9 is slidaloly mounted on and. is carried by the pivoted it will move therewith about slide bar. 10 which is slidably mounted in a guideway 11 in the pivoted jaw. Prefera bly the, slidable jaw is provided on its outer sidewith an inclined bearing surlface and, as here shown, the outer portion 12 of the slidable aw is cut away on both sides to provide shoulders 13; which are inclined inwardly and toward the handle 1. '(i ooperating with the shoulders on the slidable jaw is a suitable stop which is so mounted that it will not move with the jaws about the axis 6 and, consequently; when the jaws are moved about that axis the position of the slidable aw with relation to the stop will be altered and because of the inclined surfaces the outer limit of movement of that jaw will be varied. ln the present construction I have mounted the stop upon the pivoted jaw and to that end thepivoted aw is provided with a forwardly "eXtending portion provided in each. side with a guideway loand the stop is in the form of a bifur-- cated block 16 the two parts of which are slidably mounted in the respective guidewayslo, I also prefer that this block shall have that end adjacent to the slidalole inclinedas shown 1.7 to correspond with the inclination of the shoulders' lf'i on the slidable jaw. Theinclined ends of the two parts of the stop overlap the inclined shoulders of the jaw and form a positive stop to limit the outward movement of that jaw, that is, to limit the movement of the slidable jaw away from the pivoted jaw.

Obviously, the amount of movement which may be imparted to the slidable jaw is determined by the relative positions of the inclined surfaces of the stop and the The stop is held against movement with the avvs about the pivot pin 6, and to this end I have connected the stop with the handle 1 in such a manner as to hold it against movement lengthwise of the handle but permit it to accommodate itself to the changed positions of the guideways 15 due to the movement of the pivoted jaw about its axis As shown in Figs. 1 and 2, this connection is accomplished by a connecting device comprising a member 18 pivotally. mounted on a lug 19 carried by the stop and having its other end rotat-ably mounted in a socket 20 formed in a head 21 having a shank 22 which is screw threaded into a trunnion 23 journaled in the handle. That portion of the member 18 which extends into the socket 20 is provided with a circumferential groove 24 and a pin 25 is mounted in the wall of the socket and extends into the groove to hold the member 18 in the socket, but to permit the relative rotation of the two parts. It will be apparent that the rotation of the head 21"wil1 cause the, connecting device and the stop 16 to move toward or from the slidable jaw, thus altering the relative positions of the inclined surfaces of the jaw and the stop and changing the limit of movement of the aw. In this manner the wrench may be accommodated to nuts of different sizes. When the wrench has been placed upon a nut and the handle is moved in a forward direction, that is, downward in Figs. 1 and 2, the jaws will. grip the faces of the nut and as the pressure of the handleis against the wall 8 of the pivoted jaw there is no tendency for the jaw to move about its axis and the outward movement of the slidable jaw being prevented by the stop 16, it will be apparent that the nut' will be very firmly gripped between the jaws and may be rotated vby the wrench. l/Vhen the handle is moved in a rearward direction, that is, upwardly in Figs. 1 and 2, thepivoted jaw will move about its axis, thus carrying the slidable jaw upwardly and away from the stop 16 and permitting the two jaws to be separated an increased distance sufficient to enable them to ride over the corners or" the nut, as shown. in F 2. Assoon as the jaws have passed the corners of the nut they will be restored to their normal positions by the action of the spring pressed plunger 7 and will take a fresh grip on the nut when the handle is again moved it'orwardly. v 7

, /Vhen the wrench is designed for use on nuts of a single size only the adjustable feature may be eliminated and the wrench shown in Fig. 7 is designed for this purpose. As there shown, the wrench corre sponds in construction with that above described, with the exception that the stop,

shown at 26 in Fig. 7, is of an increased length and is provided in its end portion with a transverse socket 27 to receive the rounded head 28 of a stud 29 carried by the handle. otal and a sliding movement relatively to the stud and, consequently, is free to accommodate itself to the changed positions of the guideways in the pivoted aw when'the latter is moved about its axis.

The operation of the device will be readily understood from the foregoing description of the several parts thereof and it will be apparent that I have provided an open end wrench, the jaws of which will'yield to permit the same to be moved from one posi tion to another on the nut without removing the wrench from the nut, thereby greatly ta cilitating the tightening up of the nut.

The stop is capable of both a piv Further, it will be apparent that the wrench i is of a very strong, durable character and that the parts thereof are so constructed that they are not liable to breakage or disarrang ment. Further, the wrench is adjustable so otally mounted on said handle, a second aw movable toward and from the said pivoted jaw, and a device movable relatively to said handle and controlled by therelative move ment of the pivoted jaw and the handle to control the movement oisaid second aw.

2. In a wrench, a handle for supporting and manipulating said wrench, a jaw pivotally mounted on said handle, a second jaw movably mounted on the pivoted jaw and movable therewith about its axis, and a de vice movable relatively to said handle and controlled by the relative movement of said jaw and said handle to control the movement of said second jaw relatively to said pivoted jaw.

3. In a wrench, a handle,.a jaw pivotally mounted on said handle, a second jaw 1nov ably mounted on the pivoted jaw and movable therewith about its axis, and apart connected with said handle and held against movement with said pivoted jaw to control the movement of said second jaw, "one of .said parts having an inclined surface so arjaw. a

that of the second jaw, about the axis ofthe pivoted jaw, will vary themovenient which may be imparted to said second jaw relatively to the fixed &. Ina wrench handlepa pivotally mounted on said handle, a second jaw movably mounted on the pivoted aw and movable therewith about its axis, said pivoted jaw having a part extending beyond the face thereof,a stop movably mounted von said part of said pivoted jaw, having an inclined face to engage said second aw and connected with said handle.

' 5. In awrench, a handle, ajaw pivotally mounted on s'aidhandle, a second jaw slidably mounted on. the pivotedjj aw andmov able therewith about its axis, said pivoted jaw having a part extending beyond the face jthereo f,a stop movably mounted on said part of said pivoted jaw, having an inclined face toengagesaid slidable jaw and pivotally connected with saidhandle.

6. In a wrench, a handle, a jaw pivot-ally mounted on said handle, a second aw movably mounted on the pivoted jaw and movable therewithabout its axis, said pivoted jaw having a partextendingbeyond the face thereof, a stop movably mounted on said part of said pivoted jaw, having an inclined face to engage said jaw, and adjustably connected with said handle.

7. In awrench, a handle, a jaw pivotally mounted on said handle, a second jaw slidably mounted on the pivoted aw and movable therewith about its axis, said pivoted jaw having a part extending beyond the an inclined surface to cooperate with the inclined surface of said second jaw, and means for connecting said stop with said handle to prevent its movement with said pivoted jaw.

9. In a wrench, a handle, a jaw pivotally mounted on said handle and having a part extending beyond the face thereof, a second slidable jaw having on its outer side an inclined surface, a stop movably'mounted on said part of said pivoted jaw and having an inclined surface to cooperate with the inclined. surface of said slidable jaw, and

means for connecting said stop with said pivotally aw slidablv mounted on said pivoted jaw and movable therewith about its axis, said handle-to prevent its movement with said pivoted jaw, and yieldable means acting on sa d plvoted j aw to retain the same in its normal position.

4 10. In a wrench, a handle, a jaw pivotally mounted onsaid handle,a second jaw movably mounted on the pivoted jaw and movable therewith about its axis, means controlled by the relative movement of said pivoted jaw and said handle to control the IIIOVQIHGDE OIE631d second aw relative to said pivoted jaw, and yieldable means acting on said pivoted jaw to retain the same un ts normal position. 4

all. In a wrench, a handle, a jaw pivotally mo-untedon said handle and having a part projecting beyond the face thereof and provided at each side thereof with a guide- ,way arranged substantially parallel Wltll the face of the aw, a second jaw slidably n' 'ountedon said pivotedjaw for movement toward and from the same, and movable with said pivoted jaw about its axis, said slidable jaw having bearing surfaces on the outer face thereof, a stop comprising parts slidably mounted in said gnideways and ,12.-In awrench, a handle, a jaw pivotally mounted on said handle and having a part projecting beyond the face thereof and provided at each side. thereof with a guideway arranged substantially parallel with the face of the jaw, a second jaw slidably mounted on said pivoted jaw for movement toward and from the same, and movable with said pivoted jaw about its axis, said slidable jaw having bearing surfaces on the outer side thereof, a stop comprising parts slidably mounted in said guideways and having inclined surfaces to engage the hearing surface of said slidable aw, said parts being rigidly connected one to the other, and a connecting device pivotally connected with said. stop and pivotally connected with said handle. a

13. In a wrench, a handle. a jaw pivotally mounted on said handle and having a partprojecting beyond the face thereof and provided at each side thereof with a gnideway arranged substantially parallel with the face 'of the jaw, a second jaw slidably mounted on said pivoted jaw for movement toward. and from the same, and movable wlth said p voted aw about its axis,isaid slidable jaw having bearing surfaces on the outer sidethereof, a stop comprising parts slidably mounted in said guideways and "having inclined surfaces to engage the bearing surfacesofsaid slidable aw, said parts being ri idly connected one to the other, and means for connectingsaid parts with said handle.

having inclined surfaces to engage the bear- Y ing surface of said slidable jaw, said parts being rigidly connected one to the other, a device pivotally connected with said stopand comprising 7 a rotatable part having screw threaded connection with said handle.

14. In. a wrench, a handle, a jaw pivotally mounted on said handle and having a part projecting beyond the face thereof and provided at each side thereof with a guideway arranged substantially parallel with the face of the jaw, a second jaw slidably mounted o n said pivoted jaw for movement toward and from the same, and movable with said pivoted jaw about its axis, said slidable jaw having bearing surfaces on the outer side thereof, a stop comprising parts slidably mounted in said guideways and having inclined surfaces to engage the bear ing surface of said shdable aw, said parts being rigidly connected one to the other, a

connecting device comprising a part pivotally connected with said stop, a second part rotatably mounted on the first mentioned part and having a screw threaded shank, a

trunnion ournaled in said handle and havceive the rounded corner of said handle and having a lug adaptedto enter the slot in said handle, a pivot pin to secure said lug in said slot,'the walls of (said "recess being arranged to permit said jaw to have movement relatively to said handle about said pivot pin and one wall of said recess acting as a stop tolimit the relative movement of the handle and the jaw, said jaw structure also having a part extending beyond the face of said jaw and provided in its opposite sides with guideways, a second jaw slidably mounted on said pivotedjaw for moveiuent toward and from the same and movable therewith about the axis of said pivot pin, said slidable jaw having on its outer side inclined bearing surfaces, a stop com prising parts slidab ly mounted in said guideways and having'inclined surfaces to cooperate with the inclined surfaces of said slidable jaw,anda connection between said stop and said handle to hold the stop against movement with said pivoted jaw structure when the latter moves about its axis. i v v In testimony whereof, I affiX my signature hereto.

JOHN B. MENZQL. 

